US PATENT SUBCLASS 528 / 391
.~.~ From organic reactant containing a sulfur to oxygen bond, e.g., -S(=O), etc.


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528 /   HD   SYNTHETIC RESINS OR NATURAL RUBBERS -- PART OF THE CLASS 520 SERIES

*  DD  SYNTHETIC RESINS (Class 520, Subclass 1) {23}
373  DF  .~ FROM SULFUR-CONTAINING REACTANT {5}
391.~.~ From organic reactant containing a sulfur to oxygen bond, e.g., -S(=O), etc.


DEFINITION

Classification: 528/391

(under subclass 373) Subject matter wherein a polymer is prepared from an organic reactant containing a sulfur atom bonded to one or more oxygen atoms (e.g., sulfonates, sulfones, etc.).